What makes a computer run loudly? also, how do you make a computer run more quietly?
by 
King Tom
ANSWERS: 6
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Well mine is quiet. A may well be the bearing on the cooling fan.
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get it some running shoes :) with shock absorbance and noise reduction :O
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I agree with GreekGod sounds like a fan problem... could just be dirty - you can blast them clean with a can of air. Could be a malfunctioning fan... you should replace it asap. They're cheap... and if they quit, you can cause serious damage to the chips in your system...
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First action : Get a blower, open your pc's cabinet and blow the dust out of it. If the noise continues go to second action. Second action : Start replacing your cpu's fan with a quieter one (if your cpu came in a boxed set then it is ok as noise is concerned). Continue by replacing your power supply unit with a more quality and noiseless one like zalman. Next step is to replace your graphics card with a noiseless one (they are more expensive). If you have a cabinet fan replace it too with a noiseless one. If you still have noise, what is left is your hard drive. There are hard drives in the market that are relatively noiseless. From my experience most western digital models with a 3-year guarantee are the ones.
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Four out of five times, it's a fan. Maybe it's the airflow, maybe it's got a dirty bearing, but it's usually the fan(s). Speedfan or a hardware-based fan speed controller *may* help, but may also overheat your system; slower fans cool less. My BIOS has an option to run the fan at a lower speed unless/until the CPU temp hits a certain threshold, so I occasionally hear my PC get loud for a few minutes when it's thinking hard, only to quiet back down a couple of minutes later. The CPU fan is usually the biggest culprit so a high-quality third-party CPU cooler may knock a few decibels off.
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A fan. Or two. You'll most likely find them sitting on top of the CPU, on top of the GPU and mounted to the chassis. Clean the dust out of them on a regular basis, and switch to a smooth running design, like ball bearing (cost a bit more, but worth it).
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